.zx {
    top: 150px;
    text-align: center;
    position: absolute;
    margin-left: 690px;
}

.kd {
    background-color: whitesmoke;
    width: 300px;
    height: 200px;
    margin-left: 380px;
    margin-top: 300px;
    position: absolute;
    text-align: center;
}

.hd {
    background-color: whitesmoke;
    width: 300px;
    height: 200px;
    margin-left: 700px;
    margin-top: 300px;
    position: absolute;
    text-align: center;
}

.ow {
    background-color: whitesmoke;
    width: 300px;
    height: 200px;
    margin-left: 1020px;
    margin-top: 300px;
    position: absolute;
    text-align: center;
}

.er {
    background-color: whitesmoke;
    width: 460px;
    height: 100px;
    margin-left: 380px;
    margin-top: 520px;
    position: absolute;
    text-align: center;
}

.qw {
    background-color: whitesmoke;
    width: 460px;
    height: 100px;
    margin-left: 860px;
    margin-top: 520px;
    position: absolute;
    text-align: center;
}

.qwer {
    margin-top: 520px;
    position: absolute;
    text-align: center;
}